$(document).ready(function () {
    $("#search_content").keyup(function () {

        $.ajax({
            type: "POST",
            anync: true,
            url: "HelpCenterSuggestion.ashx",
            cache: false,
            dataType: "text",
            data: { m: $("#search_content").val() },
            success: function (result) {
                alert(result);

                $("#UlContent li").remove();
                $("#UlContent").append(result);
            }

        });


    });
})